Eva Krejcirova created AVRO-2194:
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Summary: GenericRecord and specific class return different java
type for the same field with logicalType
Key: AVRO-2194
URL: https://issues.apache.org/jira/browse/AVRO-2194
Project: Avro
Issue Type: Bug
Components: java, logical types
Affects Versions: 1.8.2
Reporter: Eva Krejcirova
Attachments: avrotest.zip
I have an Avro schema which contains field with logical type timestamp-millis.
When I deserialize an object with this schema from json to GenericRecord, I
get Long as type of this field. When I deserialize it to specific class, I get
DateTime. This prevents me to write a generic code which would handle both
cases (I would expect this to be possible since the generated class implements
GenericRecord interface).
E.g.
{code:java}
final GenericRecord timestampGenericRecord =
readJsonGeneric("timestamptest.json", schema);
final TimestampTest timestampTestIn = readJson("timestamptest.json",
timestampTestOut.getClass(), schema);
System.out.println("------------ Generic record --------------");
printTimestamp(timestampGenericRecord);
System.out.println("------------ Specific record --------------");
printTimestamp(timestampTestIn);
----
private static void printTimestamp(GenericRecord record) {
System.out.println(record);
System.out.println(record.get("timestampDateTime").getClass());
}{code}
prints out:
{code:java}
------------ Generic record --------------
{"timestampLong": 1530023620474, "timestampDateTime": 1530023620478}
class java.lang.Long
------------ Specific record --------------
{"timestampLong": 1530023620474, "timestampDateTime": 2018-06-26T14:33:40.478Z}
class org.joda.time.DateTime
{code}
I am attaching sample code which demonstrates the problem.
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